Comment 14 for bug 1813216

Reviewed: https://review.opendev.org/640197
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=5d5e7be8cbb6d37b20c7efcac7850562d3281904
Submitter: Zuul
Branch: stable/queens

commit 5d5e7be8cbb6d37b20c7efcac7850562d3281904
Author: Matt Riedemann <email address hidden>
Date: Tue Feb 5 10:40:33 2019 -0500

    Fix legacy-grenade-dsvm-neutron-multinode-live-migration

    Since change I81301eeecc7669a169deeb1e2c5d298a595aab94 in
    devstack, nova-cpu.conf is a copy of nova.conf minus
    database access. Grenade jobs also run nova-compute with
    nova-cpu.conf anyway so we can just drop the conditional
    which was otherwise messing up the config file that the
    ceph script would write rbd configuration which is why
    live block migration tests with ceph were failing.

    NOTE(mriedem): This is not a pure backport since this change
    in queens just disables running the job with ceph because of
    a mess of changes to devstack queens related to change
    https://review.openstack.org/625131/ and change
    https://review.openstack.org/632100/. As a result, the pike
    node runs with nova.conf (because of grenade singleconductor
    mode makes it so) but the queens node runs with nova-cpu.conf
    and then the _ceph_configure_nova function does not configure
    the nodes for rbd auth properly which makes rbd-backed live
    migration in the job fail. Rather than try to sort that all out
    with a one-off change in queens (which is pretty old at this
    point anyway), this change just skips the ceph portion of the
    job. An alternative is just not running the job in queens, but
    we can easily still get block migrate live migration coverage
    so we might as well keep that running.

    Change-Id: I902e459093af9b82f9033d58cffcb2a628f5ec39
    Closes-Bug: #1813216
    (cherry picked from commit f2db43d57ae980d8cdf08de4f5e6290d7edcc95c)
    (cherry picked from commit c4a2a32f07cbe139b5889654bbc82d3ddeaeeb94)